Select "Han" (first spinner) and "Hu" (second spinner),and Push "Calculate" you can find your points of mahjong.This App is very simple, but you can recognize how to calculate that is.if you want to learn, try this!note:The way how to calculate your points on this app,it’s based on "Japanese Mahjong rules"*1 "Hu" is up to 120*2 "Han" is up to 13